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Date: Mon, 19 Mar 2018 20:45:13 +0100
From: Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v6 12/15] xfs: require mmap lock for xfs_break_layouts()
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To: Dan Williams <dan.j.williams@intel.com>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>, linux-nvdimm <linux-nvdimm@lists.01.org>, Ross Zwisler <ross.zwisler@linux.intel.com>, Dave Chinner <david@fromorbit.com>, Christoph Hellwig <hch@lst.de>, linux-xfs <linux-xfs@vger.kernel.org>, linux-fsdevel <linux-fsdevel@vger.kernel.org>, Jan Kara <jack@suse.cz>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>

On Mon, Mar 19, 2018 at 10:57:55AM -0700, Dan Williams wrote:
> I don't see anything to adapt with respect to mmap locks since reflink
> and dax are mutually exclusive.

For now.  I'll change that pretty soon.